Saw frame



Aug. 25, 1931. J JANDA 1,820,457

SAW FRAME Filed Nov. 29 1930 IL- :L .3 /X a INVENTOR.

BY w

A TTORNE Y.

JUSEFl-I Jamsv Patented Aug. 25, '1931 JOSEPH 'J'ANDA, F BROOKLYN, 'NEW YORK ,sAw fireman I Application filed November 29,1930. Serial No. 498,967. i

My invention relates to tool holders and more particularly to hack-saw frames, and has for its particular object to so construct the frame and the cooperating parts for holding the saw-blade as to enable anyone to readily adjust the saw-blade to different planes relative to'the frame. 1

' Onthe appended drawings on which I have illustrated my invention to *afiord a complete understanding thereof, Fig. 1 is an elevational view of a preferred embo diment of my new hack-saw frame, the sawblade beingshown in outline; Fig. 2 is an end-view ofthe framewhen viewed from the cutting edge of the saw-blade; Fig. 3, drawn to a larger scale, shows parts of the handle whereby the saw-blade may be displaced, a portion being broken outfor illustration purposes; Fig. 1 is a view similar to Fig. 3, but taken at right angles thereto. In Fig. 1 is shown at 1 a hack-saw frame of the usual U-shape, comprising the substantially parallel'arnis 2 and 3. At 4 is indicated the saw-blade. {The arm 2 of the frame has at its forward end a short slot 5 to receive the one end ofthe saw-blade 2. Through this end passes a pin 6'which,

bears against the outside of arm 2 which at this place is slightly notched to form a seat for the pin 6. The" other end of the saw-blade is received, in the slot 7 of a small memberS in which slo-t theblade is held by a pin 9 The m ember 8'ispivotally received between the lugs'lO and 11 of a holder 12' which is slotted at 13 and pro.-

vided with a roundbore 14.110 receivethe end of the arm 3 of frame 1 so that the holder 12 may be swung about said arm in either direction at right angles to the plane 7 of frame 1. The'slot 13 extends all the way through to the outer end of holdernl2 which end, as clearly shown in Figs. 3 and 4 at215 is provided with outerscrew-threads.

At 16 is shown the handle, which near its p inner end is provided" with femalethreads to fit the outer threads 15' of holder 12 so' 16 can bescrewed upon or,

that the handle I unscrewed from holder 12; At its inner end handle 16 is provided with-a bevelled wall 17 which fits a corresponding bevelled po-r-' tion 18 formed on holder 12, so that as the handle 16 isscr'ewed onto the holder, the

slotfl3 is narrowed more and more, until 'the "holder firmly grips the arm 3 of frame 1';

Now when direction to awposit on in whichthe saw blade is displaced relative to the plane of the frame, as' for"-.instance shown by the broken lines in,Fig. 2.

isagain; tightened uponthe arm 3 ofthe' frame and the saw-blade is ready convenient, while with handle used with difiiculty only.

. "The angle formed "by the as. 16 with the frame 1 as shown bythe broken-line position of the'handle in Fig.2 can be further increased without detriment to'the same inventive idea may lar. tool hbldersz" I claim 1. "combma'tion i with a substantially U-"shapedsaw-frame, a blade holder" slotted lengthwise so as to form two clamping members shaped to receive between "them one-arm of sa1d saw-frame,-and screw means cooperating with said clamping-members for"- drawing them together into clamping engagement with said frame arm.

by means of handle Upon handle.- '16" being then screwed back again, while is held in its new position, the holder 12 for use,'-. the sawing operationbeing thereby made 16 in its normal straight position, the sawcou'ld "be saw-blade or undue strains imparted there- .to. I evident that the invention caneb'e embodied in .other constructions without '55 I the saw is to 'be' used in a more or less inaccessible place, or under icondi-Q tionswhere it wouldbe hard to saw with the. handle'16 assuming its straight" posi-. as shown in Fig. 1 or in the rename I do not limit myself to the con-. 1 I struction as shown. 1

I also wish it to 'be understood-that the-- be applied to simi-f 2. In combination with a substantially U-shaped saw-frame, a blade-holder slotted lengthwise so as to form two clamping members shaped to receive therebetween one arm of said saw-frame, said clamping members being provided with screw-threads, a handle for screw threaded engagement with said clamping members, and means whereby tightening of said handle on said members forces the latter together into clamping engagement with said arm of said frame.

3. In combination with a substantially U-shaped saw-frame, a blade-holder slotted lengthwise so as to form two clamping members shaped to receive therebetween one of the arms of said frame, said clamping members each being provided with screw threads and a bevelled portion adjacent thereto, and a handle formed with female threads to engage the screw-threads of said clamping members, said handle further being formed with a bevelled portion to engage the bevelled portions of said clamping members so as to draw the latter into ela1nping engagement with said arm by tightening of the handle on said members.

4. In combination with a substantially U-shaped saw frame, a blade holder slotted to provide a pair of clamping members to receive therebetween one of the arms of the saw frame, and means for drawing said clamping members together into clamping engagement with said frame arm.

5. In combination with a substantially U-shaped saw frame, a blade holder slotted to provide a pair of clamping members to receive therebetween one of the arms of the saw frame, and screw operated wedging means for drawing said clamping members together into clamping engagement with said frame arm. a

a In testimony whereof I afiix mysignatnre,

JOSEPH JANDA. 

